User ManualTable of ContentsTFX12V Thin Form Factor with 12-Volt Connector Power Supply Design Guide1Revision History3Contents41 Introduction71.1 TFX12V Scope71.2 TFX12V Overview71.2.1 Small System Optimized Profile71.2.2 Improved Acoustics81.3 Key Changes for TFX12V Version 2.081.3.1 Increased +12 VDC Output Capability81.3.2 Minimum Efficiency81.3.3 Main Power Connector81.3.4 Separate Current Limit for 12V2 on the 2x2 Connector81.4 Terminology92 Electrical102.1 AC Input102.1.1 Input Over Current Protection102.1.2 Inrush Current Limiting102.1.3 Input Under Voltage102.1.4 Regulatory112.1.5 Catastrophic Failure Protection122.2 DC Output122.2.1 DC Voltage Regulation122.2.2 Remote Sensing122.2.3 Typical Power Distribution132.2.4 Power Limit / Hazardous Energy Levels162.2.5 Efficiency General162.2.6 Other Low Power System Requirements182.2.7 Output Ripple/Noise182.2.8 Output Transient Response192.2.9 Capacitive Load202.2.10 Closed-loop Stability202.2.11 +5 VDC / +3.3 VDC Power Sequencing202.2.12 Voltage Hold-up Time202.3 Timing / Housekeeping / Control212.3.1 PWR_OK222.3.2 PS_ON#222.3.3 +5 VSB232.3.4 Power-on Time232.3.5 Rise Time242.3.6 Overshoot at Turn-on / Turn-off242.3.7 Reset after Shutdown242.3.8 +5 VSB at AC Power-down242.4 Output Protection242.4.1 Over Voltage Protection242.4.2 Short-circuit Protection252.4.3 No-load Operation252.4.4 Over Current Protection252.4.5 Over-temperature Protection252.4.6 Output Bypass253 Mechanical263.1 Labeling /Marking263.2 Physical Dimensions263.3 Mounting Options293.4 Chassis Requirements303.5 Airflow / Fan313.6 AC Connector313.7 DC Connectors323.7.1 TFX12V Main Power Connector333.7.2 Peripheral Connector(s)333.7.3 Floppy Drive Connector333.7.4 +12 V Power Connector343.7.5 Serial ATA Power Connector344 Environmental354.1 Temperature354.2 Thermal Shock (Shipping)354.3 Relative Humidity354.4 Altitude Requirement354.5 Mechanical Shock354.6 Random Vibration364.7 Acoustics364.8 Ecological Requirements365 Safety375.1 North America375.2 International376 Electromagnetic Compatibility386.1 Emissions386.2 Immunity386.3 Input Line Current Harmonic Content396.4 Magnetic Leakage Fields396.5 Voltage Fluctuations and Flicker397 System Cooling Considerations408 Reliability409 Applicable Documents40Size: 617 KBPages: 40Language: EnglishOpen manual